Drawbar extension for land levelers



June 6, 1950 A. cs. G'URRI ES ET AL DRAWBAR EXTENSION FOR LAND 'LEVELEBSFiled Nov. 1.6, '1948 INVENTORS G. Gurraes ie J1: Mi viz/LAZY ATTORNEYSPatented June 6, 1950 UNITED STATES PATENT 2,510,470

Dfi'AW'is AIi; EXT NSION were LAND LE VELERS Albert G; Gilfris and-JohnAa- Whit, Jn, Ginny; Cal-if.-,- assig-nors; by direct and rhesneassign-- ments, to Be-Ge Manufacturing C01; Gilroy, Calili, acorporationof California application Navemter 16, 1948, Serial No. 66,353

7 Glaims; 1

invention relatesin general to earth scrapers or revelers of thetypeincluding: a forwardly projecting drEtWbar adapted to connect tractor. This drawbar conventionally is relatively short, but for certainleveling operations it desired that the drawba'r b'e extended lengthsothat the scraper or leveler trails a greater distance behind thetractor.

It is therefo-re"an object of" this invention provide a novel extensionfor the drewber of an earthworking implement asabove.

Another ob'iect of the invention is" to provide adrawb'ar extensionwhichis de'sig'ne'd for ready attachment to the drawb'a-r of the implement,and when so attached the extension is in rigid. relation to said drawbaras is desirable.

' A further object ofthe' invention istoprovide a drawbar extensionwhich" simple pet ruggedin construction; being capable of economicmanufacture. V

A further object of the invention is to p'r'ovide a practicaland-reliable drawbar' extension, and one which will be exceedinglyeffective' for the purpose'for which it is designed. v r

' These objects are accomplished by'means of such structure and relativearrangementfof' parts aswillfully appear by a perusal of the followingspecification and claims.

In the drawings.

Fig; 1 is a side elevation of the drawbar extension as in use. I

Fig. 2 is a fragmentary enlarged sectional elevation showing theconnection between'thedr'awbar of the implement and the'ext'ension'beam;

Fig. 3 is a fragmentary plan view; generally of the structure shown inFig. 2,-but detached from the drawbar. I V V I Referring now moreparticularly to the char' acters of reference on the drawings, thedrawbar extension, which is indicated generally at l, is adapted forconnection between the conventional drawbar 2 of an earth scraper orleveler, indicated generally at 3, and the hitch 4 of a tractorindicated in part at 5.

In the present embodiment the leveler 3 is of a type which includes abowl 6 and transversely spaced rear wheels W relatively verticallyadjustably mounted in connection with the bowl 6 by a mount, indicatedgenerally at 1, controlled by a longitudinal power cylinder 8 mountedatop said bowl.

The power cylinder 8 is of double acting type, and a pair of hoses 9lead forwardly from such cylinder for the supply and exhaust of fluidpressure to and from the same.

Below the" powereyunder' 8-- end; eearrauy 6f the sides of the bowl 6,the leveler iiicliids the: forwardly projecting drawbar 2 h dis posed ata forward and downward i clin, andf fitted, at its front end; with a-ibliivardlypldj e'ct-" sv'v'iv'ei eye I'll whose" longitudinal axis issub-- starinauy hori'z'dnt'al.

The drawbar extension I'- con iprises a rigid elongated extension beam His tubular; and thus none-w, as at I21;

At its rel-ward end the extension; beam if includes" aswivel eye I53}adapted to be detachabl yf connected with the tractor hitch 4'- By meansor: a vertical, draft pin 41 At its rear en th extension been a; is affixed}- onopposite sides, to longitudinal, wer warely and upwardlyinclined side plates" is whichproject some distan e tothe rear of thbeam l!-',- and upward inclination of; sai'di plates ais'poees themsubstantially parallel to the; drawbar -2.-

use of the extension the dreamer at its. forward end portion, projectsbetween the side'- plates 9-5 in close matching relation thereto, and

the" swivel eye It extends into the rear" open ehdi portion of the beardl l.

The swivel eye HT disposed with the axis of" its openi g it extending atransverse hori- Zens-a1 plane, and a transversedrart pin [1 ex-- ten sthrough said eye; and through the ed a dear parts or theses-m nandsi'de' plates is, in practice this transverse draft pin H is in theform of afb'olt'.

drawbe'r' 2" projects} short or its forward;

end between upper and lower cross bolts [8 and [9 which ekt'ehd betweenside plates 5 in vertically spaced relatior'r adjaceni'i the rear orfreeefids ofsaid plates. The crossbolts IB and idhear' directly on theupper and lower edges, respectively, of the drawbar.

With the'above described arrangement there is provided an effective andrigid connection between the drawbar 2 and extension beam I I, yet theconnection is such that it may be readily attached or detached.

The hoses 9 which normally connect by quick detachable couplings 20 tocorresponding hoses 2| leading from the tractor are connected as followswhen the extension beam II is in use:

The extension beam I I includes, on top thereof, longitudinal pipes 22corresponding to said hoses, and. held in place on the beam by clamps23. The quick detachable couplings 20 are used to connect withcorresponding fittin parts on the ends of the pipes 22, whereby thelater become a part of the fluid pressure system between the tractor 5and the power cylinder of the leveler 3.

When the extension beam ll is connected as described and in use, theleveler 3 trails the tractor 5 to a substantially greater distance thannormally, and as is desirable for certain types of earth working orleveling operations.

Additionally, the arrangement is such that when the extension is in use,the drawbar is maintained at its normal forward and downwardinclination.

From the foregoing description it will be readily seen that there hasbeen produced such a device as substantially fulfills the objects of theinvention, as set forth herein.

While this specification sets forth in detail the present and preferredconstruction of the device, still in practice such deviations from suchdetail may be resorted to as do not form a departure from the spirit ofthe invention, as defined by the appended claims.

Having thus described the invention the following is claimed as new anduseful, and upon which Letters Patent are desired:

1. An extension for the drawbar of an implement, com-prising a rigid,longitudinal extension beam, means on the front end of the extensionbeam for connection to the hitch of a tractor, and means on the rear endof the extension beam adapted to rigidly connect the same to the forwardend portion of the drawbar of the implement; said drawbar including aprojecting eye at the forward end, the rear end portion of the beambeing hollow and the eye projecting thereinto, and said last named meansincluding a cross pin extending through the beam and eye.

2. An extension, as in claim 1, in which said last named means includeslongitudinal mem bers projecting rearwardly in spaced relation forengagement on opposite parts of the drawbar, and means securing thedrawbar against escape from between said members.

3. An extension, as in claim 1, in which said last named means includeslongitudinal members projecting rearwardly in spaced relation forengagement on opposite sides of the drawbar, and means securing thedrawbar against escape from between said members; said securing meansbeing cross bolts between said members in spaced relation and with thedrawbar between said cross bolts.

4. An extension for the drawbar of an implement, comprising a rigid,longitudinal extension beam, means on the front beam for connection tothe hitch of a tractor, the drawbar including a projectin eye at theforward end, the rear end of the beam being hollow and the eye engagingtherein, a transverse draft pin extending through the beam and eye,transversely spaced side plates secured to the beam at the rear end andprojecting some distance rearwardly therefrom on opposite sides of thedrawbar, and means securing the drawbar between said plates.

5. An extension for the drawbar of an implement, comprising a rigid,longitudinal extension beam, means on the front beam for connection tothe hitch of a tractor, the drawbar including a projecting eye at theforward end, the rear end of the beam being hollow and the eye engagingtherein, a transverse draft pin extendin through the beam and eye,transversely spaced side plates secured to the beam at the rear end andprojecting some distance rearwardly therefrom on opposite sides of thedrawbar, and means securin the drawbar between said plates; saidsecuring means being cross bolts between the plates above and below thedrawbar.

6. An extension for the drawbar of an implement, comprising a rigid,longitudinal extension beam, means on the front beam for connection tothe hitch of a tractor, the drawbar including a projecting eye at theforward end, the rear end of the beam being hollow and the eye engagingtherein, a transverse draft pin extending through the beam and eye,transversely spaced side plates secured to the beam at the rear end andprojecting some distance rearwardly therefrom on opposite sides of thedrawbar, and means securing the drawbar between said plates; saidsecuring means being cross bolts between the plates above and below thedrawbar, said cross bolts being a substantial distance to the rear ofsaid transverse draft pin.

7. An extension for the drawbar of an implement, comprising a rigid,longitudinal extension beam, means on the front end of the extensionbeam for connection to the hitch of a tractor, and means on the rear endof the extension beam adapted to rigidly connect the same to the forwardend portion of the drawbar of the implement; there being hoses leadingtoward the beam from the tractor and implement, a corresponding pipeassembly secured along the beam, and couplings between the hoses andpipe assembly.

ALBERT G. GURRIETS. JOHN A. WHITE, JR.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,289,407 Davis Dec. 31, 19181,296,105 Navratil Mar, 4, 1919

